Aptitude - Average - Discussion
Discussion Forum : Average - General Questions (Q.No. 4)
4.
The average of 20 numbers is zero. Of them, at the most, how many may be greater than zero?
Answer: Option
Explanation:
Average of 20 numbers = 0.
Sum of 20 numbers (0 x 20) = 0.
It is quite possible that 19 of these numbers may be positive and if their sum is a then 20th number is (-a).
Discussion:
135 comments Page 12 of 14.
SOUMYADEEP said:
5 years ago
Here, it is asked that, how many numbers may be greater than 0 and not will be greater than 0! please explain the difference?
Parikshit said:
5 years ago
The answer could be 10.
N A said:
5 years ago
Here, it is asked that at the most, how many may be greater than zero.
So let see.
(1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1-19)/20 = 0.
Now see it's 19 number which is greater 0.
So let see.
(1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1-19)/20 = 0.
Now see it's 19 number which is greater 0.
(3)
Aditya said:
5 years ago
It may be possible that all numbers are negative and only one is positive like
(-1-1-1-1-1-1-1-1-1-1-1-1-1-1-1-1-1-1-1+19)/20 = 0.
(-1-1-1-1-1-1-1-1-1-1-1-1-1-1-1-1-1-1-1+19)/20 = 0.
(1)
Saitama said:
5 years ago
Thanks for explaining @Tarun.
Shehzad adil said:
5 years ago
Average can't be zero even if any of the numbers is greater than zero.
Shehzad adil said:
5 years ago
0 = (numbers sum)/20.
0*20 = (numbers sum).
0 = (numbers sum).
Note :-
None of the numbers was Greater than 0.
So, the answer is "0"
0*20 = (numbers sum).
0 = (numbers sum).
Note :-
None of the numbers was Greater than 0.
So, the answer is "0"
(1)
Jahnavi said:
5 years ago
@Ameer and @Tarun.
Both your explanation is good. I agree.
Both your explanation is good. I agree.
Aniket said:
4 years ago
It is not understanding. please, anybody, help me to get it
Kavya said:
4 years ago
Thanks for explaining @Tarun.
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